CA1119361A - Methode de production de pate de cellulose au sulfite non blanchie, ou de cellulose blanchie a partir de la pate de noeuds defibree - Google Patents

Methode de production de pate de cellulose au sulfite non blanchie, ou de cellulose blanchie a partir de la pate de noeuds defibree

Info

Publication number
CA1119361A
CA1119361A CA000306697A CA306697A CA1119361A CA 1119361 A CA1119361 A CA 1119361A CA 000306697 A CA000306697 A CA 000306697A CA 306697 A CA306697 A CA 306697A CA 1119361 A CA1119361 A CA 1119361A
Authority
CA
Canada
Prior art keywords
cellulose
pulp
unbleached
knot
knots
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000306697A
Other languages
English (en)
Inventor
Ketil Hasvold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Borregaard AS
Original Assignee
Borregaard AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Borregaard AS filed Critical Borregaard AS
Application granted granted Critical
Publication of CA1119361A publication Critical patent/CA1119361A/fr
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials

Landscapes

  • Paper (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
CA000306697A 1977-07-08 1978-07-04 Methode de production de pate de cellulose au sulfite non blanchie, ou de cellulose blanchie a partir de la pate de noeuds defibree Expired CA1119361A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO772420A NO140936C (no) 1977-07-08 1977-07-08 Fremgangsmaate ved fremstilling av sulfittcellulose fra kvistmasse
NO772420 1977-07-08

Publications (1)

Publication Number Publication Date
CA1119361A true CA1119361A (fr) 1982-03-09

Family

ID=19883621

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000306697A Expired CA1119361A (fr) 1977-07-08 1978-07-04 Methode de production de pate de cellulose au sulfite non blanchie, ou de cellulose blanchie a partir de la pate de noeuds defibree

Country Status (5)

Country Link
US (1) US4230524A (fr)
CA (1) CA1119361A (fr)
FI (1) FI63449C (fr)
NO (1) NO140936C (fr)
SE (1) SE7806806L (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4435249A (en) 1979-09-05 1984-03-06 The Black Clawson Co. Process for the oxygen delignification of pulp mill rejects
SE465730C (sv) * 1988-03-17 2001-10-08 Kvaerner Pulping Tech Sätt vid delignifiering av fiberhaltig cellulosamassa
WO2009076760A1 (fr) * 2007-12-19 2009-06-25 Fpinnovations Conversion de déchets de type nœuds provenant du défibrage chimique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393121A (en) * 1965-02-05 1968-07-16 Scott Paper Co Soda cook of acid sulfite knotter rejects
US3830688A (en) * 1970-10-23 1974-08-20 Skogsaegarnas Ind Ab Method of reducing the discharge of waste products from pulp mills
US3886035A (en) * 1973-03-12 1975-05-27 Kamyr Inc Process for separating knots from pulp

Also Published As

Publication number Publication date
FI63449C (fi) 1983-06-10
NO140936B (no) 1979-09-03
FI63449B (fi) 1983-02-28
SE7806806L (sv) 1979-01-09
NO140936C (no) 1979-12-12
US4230524A (en) 1980-10-28
NO772420L (no) 1979-01-09
FI782164A (fi) 1979-01-09

Similar Documents

Publication Publication Date Title
US4952277A (en) Process for producing kraft pulp for paper using nonionic surface active agents to improve pulp yield
US4435249A (en) Process for the oxygen delignification of pulp mill rejects
US6245196B1 (en) Method and apparatus for pulp yield enhancement
US4087317A (en) High yield, low cost cellulosic pulp and hydrated gels therefrom
EP0284585A2 (fr) Procédé de fabrication de pâte papetière
JPS6029773B2 (ja) 機械フラツフト・パルプの製造法
US2749241A (en) Process for producing semi-chemical pulp
US3919041A (en) Multi-stage chlorine dioxide delignification of wood pulp
CA1119361A (fr) Methode de production de pate de cellulose au sulfite non blanchie, ou de cellulose blanchie a partir de la pate de noeuds defibree
US4734160A (en) Method of two-stage peroxide bleaching of mechanical or semi-mechanical pulp
CA1070909A (fr) Delignification au bioxyde d'azote et a l'oxygene
US3532597A (en) Preparation of dissolving pulps from wood by hydrolysis and alkaline sulfite digestion
US4699691A (en) Thermomechanical digestion process
US3013932A (en) Printing paper and process of making the same
US3617432A (en) Delignifying lignocellulose with an incomplete soda cook followed by gaseous bleaching
AU663781B2 (en) Non-sulfonated pulp
US4244780A (en) Use of thiourea dioxide in pulp bleaching processes to preserve pulp strength and aid in brightness
JP2526561B2 (ja) ケミカル爆砕法によるパルプ化方法
USRE28777E (en) Refining of vegetable matter and delignification of the refined matter with chlorine dioxide
US3445329A (en) Storage of high consistency refined pulp
US3591451A (en) Pretreatment of vegetable matter and delignification of the refined matter with chloring dioxide
US3013934A (en) High yield pulp from hardwoods
CA1129155A (fr) Emploi d'acide polyacrylique dans les procedes de blanchiment des pates pour preserver la resistance des pates et en augmenter l'eclat
US2723179A (en) Bleaching a mixture of sulfite and semi-chemical pulps
US1599489A (en) Process for the manufacture of high alpha-cellulose fiber

Legal Events

Date Code Title Description
MKEX Expiry